BREC
Air-cooled water chillers
BREF
Air-cooled water chillers with free-cooling system
1602A - 1802A - 2202A - 2502A - 2802A
3202A - 3602A - 4202A - 4802A
R134a (400-1200 kW)
1
1200
Cooling capacity [kW]
1000
800
600
400
200
0
2
1100
1000
900
kW
800
700
600
500
400
300
1602A
1802A
2202A
2502A
2802A
3202A
3602A
4202A
4802A
3
BRE Range
High level performance





R134a Refrigerant
Double screw compressors
Electronic expansion valve
Innovative fans and heat exchangers
Free-cooling & Intelligent Free-cooling
4
Refrigerants: trends for the next 2 years
Europe
A/C & Chillers
up to 300 kW
Far East & Cina
USA
R407C
20%
R407C
40%
R410A
30%
R410A
60%
R410A
80%
Chillers from
300 kW
R134a
5%
R410A
10%
R22
65%
R410A
5%
R134a
26%
R407C
30%
R134a
60%
R134a
45%
R407C
50%
R22
70%
R407C
4%
5
Trend: refrigerant / compressors
R134a
R410A
400 - 500kW
6
R134a Refrigerant
Excellent performance




High intrinsic efficiency
Single-component
Optimized components
Limited direct (GWP) and indirect
(TEWI) environmental impact
7
R134a Refrigerant
Total Equivalent Warming Impact
 Refrigerant emission during the
‘lifecycle’ of the unit
 Indirect emissions resulting from the
CO2 emissions during energy
production
Refrigerant
TEWI
R22
1968 (-3%Vs R407C)
R407C
2032
R134
1821 (-10%Vs R407C)
8
Compressors
Optimized double screw compressors
1602A 1802A 2202A 2502A 2802A 3202A 3602A 4202A
4802A
365kW 458kW 519kW 547kW 666kW 732kW 847kW 937kW 1046kW
9
Compressors
Optimized double screw compressors with



R134a
lubrication of the bearings
distribution of the oil
10
Compressors
Optimized double screw compressors with



R134a
lubrication of the bearings
distribution of the oil
constant efficiency over time
11
Compressors
Optimized double screw compressors with



R134a
lubrication of the bearings
distribution of the oil
efficiency
semplicity
12
Double screw compressors
Optimized double screw compressors with



use of R134a
lubrication of the bearings
distribution of the oil
reliability
13
Double screw compressors
Optimized double screw compressors with



use of R134a
lubrication of the bearings
distribution of the oil
reliability
efficiency
14
Double screw compressors
Optimized double screw compressors with
use of R134a
lubrication of the bearings
distribution of the oil
Impact
Gravity



15
Economizer
16
Electronic Expansion Valve
Electronic expansion valve managed by
the control
 Reliability:
operating limits respected
monitoring of the
refrigerant load
 Efficiency:
overheat management
 Tcondensation
 Precision:
 Tevaporation
17
Evaporator
“Single passage” evaporators



uniform temperature even in partial
load conditions
oil drag favoured
heat exchange always in
“countercurrent ” conditions
18
Air side exchangers
Modular structure


“V” structure
Flexibility during movement
Reliability
Ease of maintenance
Oversized
Acoustic impact
Efficiency
Maximum external temperature
19
Acousti-composite fans
Axial fans produced in a composite
material
 Aluminium core
better heat dissipation
 Plastic blades
better air flow
 Less weight
more reliability
20
BREF std
BREF EC
1000kW
34/36
External temperature [°C]
kWh
Standard
120000kWh
EC
98000kWh
Saving on the
ventilation sections
30/32
26/28
22/24
18/20
14/16
10/12
6/8
2/4
-2/0
High reliability
High efficiency
Starting current lower than the nominal
Low noise levels
-6/-4




-10/-8
Axial fans produced in composite material
with EC motor
20
18
16
14
12
10
8
6
4
2
0
-14/-12
Acousti-composite fans - EC
-20%
2 years payback
21
Acoustic impact:
Available versions
68
The basic version is already low noise,
without loss of efficiency
66


Low noise version
Ultra-low noise version
dB(A)
64
62
60
58
56
54
300
500
700
900
1100
kW
BRAC
BREC
BRAC-LN
BREC-LN
22
Electrical Panel
Protection & Reliability




Electric bars distribution
Absorbed current acquisition
Phase sequence control
Minimum and maximum power supply
control
23
Reliability:
Continuous power supply
Principal line
Double power supply
installation
Chillers
Unit
A
Unit
B
Generator
Principal Line
Generator
24
Reliability:
Continuous power supply
Double power supply
installazione
Chillers
25
Advanced Control
Precision, Reliability, Connectivity





PID Logic to control the outlet water
temperature
Continuous monitoring for the
operating parameters
Verification and control of the safety
intervals
Integrated LAN
Extensive BMS connectivity
26
Advanced Control





PID Logic to control the outlet water
temperature
Continuous monitoring for the
operating parameters
Verification and control of the safety
intervals
Integrated LAN
Extensive BMS connectivity
Delta T
Precision, Reliability, Connectivity
BREC
T without
water tank
1,6°C
1°C
0,3°C
Traditional
Time
Thermal load
< 16%
16% -25%
> 25%
27
Advanced Control
Precision, Reliability, Connectivity





PID Logic to control the outlet water
temperature
Continuous monitoring for the
operating parameters
Verification and control of the safety
intervals
Integrated LAN
Extensive BMS connectivity
28
Advanced Control
Precision, Reliability, Connectivity





PID Logic to control the outlet water
temperature
Continuous monitoring for the
operating parameters
Verification and control of the safety
intervals
Integrated LAN
Extensive BMS connectivity
29
Intelligent free-cooling
Mission critical installations require
reliability and energy savings


The logic “n+1” assures continuous
operation
Free-cooling allows for a reduction in
energy consumption
30
Intelligent free-cooling
Annual energy saving


Compared to traditional free-cooling:
up to 7%
Compared to a traditional installation:
up to 50%
31
Intelligent free-cooling
Free-cooling connections
Free-cooling coil
Evaporator
Free-cooling pump
Primary pump
Non-return valve
32
Intelligent free-cooling
Stand-by
Running
Running
Mechanical cooling
33
Intelligent free-cooling
Free-cooling
34
35